CODEWITHSUNDEEP
iosswiftfirebase
Daniele Vitali
Daniele Vitali

Reputation: 3858

Retrieving data with .Value and .ChildAdded

I have a list of data to retrieve from Firebase, using Swift. I tried to get the data using .Value and Firebase returns a dictionary with the IDs of each item and for each ID the info associated.

The endpoint I am calling is /ideas.

    let ideasRef = firebase.childByAppendingPath(IdeaStructure.PATH_IDEAS)
    ideasRef.observeEventOfType(.Value, withBlock: { snapshot in
        print(snapshot.value)
        }, withCancelBlock: { error in
            print(error.description)
    })

In order to optimize this, I changed with .ChildAdded. In this case I get only the single item without the ID associated.

Is it possible to get also the ID of each item using .ChildAdded?

If not, how can I save the ID generated by Firebase into each item? Currently I am saving each item in this way:

    let ideasRef = firebase.childByAppendingPath(IdeaStructure.PATH_IDEAS).childByAutoId()
    let idea = [
        IdeaStructure.FIELD_MESSAGE: message,
        IdeaStructure.FIELD_CREATOR_ID: userId,
        IdeaStructure.FIELD_CREATION_DATE: NSDate().formattedISO8601
    ]
    ideasRef.setValue(idea)

Upvotes: 0

Views: 475

Answers (1)

Frank van Puffelen
Frank van Puffelen

Reputation: 599766

To get the key of the snapshot, access its key property:

let ideasRef = firebase.childByAppendingPath(IdeaStructure.PATH_IDEAS)
ideasRef.observeEventOfType(.Value, withBlock: { snapshot in
    print(snapshot.key)
    print(snapshot.value)
}, withCancelBlock: { error in
    print(error.description)
})

This and many more topics are covered in Firebase's excellent programming guide for iOS.

Upvotes: 3

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